Daniel l



Patented Apr. 19, 1932 UNITED STATES PATENT OFFICE DANIEL L. MCCARTHY, OF PEARL HARBOR, HONOLULU, TERRITORY OF HAWAII SOAP No Drawing.

This invention relates to a soap intended for use in connection with either hot or cold water for the purpose of washing dishes, clothes, metals, and particularly as a hand soap for mechanics who work in grease and oil, and furthermore for use of the housewives in scrubbing grease from surfaces and paint work.

An object of this invention is to provide for making a practicable, useful soap for cleaning purposes, by effecting the saponification of a vegetable oil with an alkali without resorting to the use of caustic soda or potash or other ingredients having similarly harmful effects on human tissue, fabrics, or clothes, or other articles, to be cleaned.

Another feature of the present invention isto provide a soap that is powerful in its action in cutting grease, dissolving the dirt, softening the water, and at the same time to be least harmful to the hands and to the articles to be cleaned, and furthermore to provide a soap that will require the least amount of physical efforts in accomplishing the cleaning described above, and one that will prove a boom to housewives, and others who are required to do the cleaning. 1

With the foregoing and other objects in view, the invention consists of a novel combination, arrangement and sequence of operation that will be more particularly described and illustrated in the accompanying specification wherein is disclosed an embodiment of the invention, but it is to be understood that changes, variations and modifications may be resorted to without departing from the spirit of the claims hereto appended.

The invention in its broadest aspect consists of the saponification of a vegetable oil such as olive oil, with an aqueous solution of tri-sodium phosphate. The following proportion of the ingredients have 'given satisfactory results:-water 2 parts, tri-sodium phosphate 9 to 10 parts, olive oil 2 parts.

The proper proportionof olive oil is placed in a container to which an application of heat is made. Then an aqueous solution of trisodium phosphate, and water is eflected by aid of heat in a separate container. Heat is applied to the olive oil container until it Application filed February 5, 1980. Serial No. 426,185.

begins to boil, whereupon the aqueous solution of tri-sodium phosphate is added with constant stirrin The mass is kept boiling with constant stirring until the mass assumes the appearance of boiling glue, good end point test is found when the surface of the mass hardens upon removing a small quantity in a ladle.

When the end point is determined as above set forth, most of the water is boiled out,

and heat may be removed therefrom at this time. The mass is stirred again after the heat is removed until all of theoil, glycerine, or water is thoroughlyabsorbed by the mass, and this resulting mass becomes tough and creamy in appearance.

The viscous mass is then run out on a slab to cool and it will be found that the mass becomes solid in a short time whereupon it may be cut, molded, or ground into a very fine powder. When a powdered soap is desired, it has been found that a mixture of equal volumes of the soap prepared in ac cordance' with the present invention to an equal amount of borax which serves to soften the water and act as a bleaching agent, makes a very excellent Washing powder.

From the foregoing steps described in connection with forming a soap, of the present invention, there results a soap orsalt made by combining the free alkali of tri-sodium phosphate with a vegetable oil and therefore, there is produced a saponification of a vegetable oil with a very active cleaning agent that results in a soap free of properties imparted by caustic saponification ingredients heretofore used in the trade.

It is to be understood that by describing in detail herein, any particular form, arrangement, or sequence of operation, it is not intended to limit the invention beyond the terms of the several claims, or the requirements of the prior art.

Having thus described my invention, what I claim as new is 1. A hard soap comprising a vegetable oil and an aqueous solution of tri-sodium phosphate and water, in which all of the oil'is saponified.

2. A powdered soap consisting ofa vegeand a very n table oil completely sa onified in an aqueous solution of trisodium p osphate.

3. A hard soap consisting of approximately two parts vegetable oil, and an aqueous solution of trisodium phosphate composed of beween nine and ten parts of trisodium phosphate and two parts of water, whereby all of the oil is saponified.

4. A process of making a soap solid at ordinary temperatures, comprising adding approximately two parts of a vegetable oil, an aqueous solution of trisodium phosphate composed of between nine (9) and ten (10) parts of trisodium phosphate and two parts of water, whereby all of the oil is saponified.

In testimony whereof I afiix my signature.

DANIEL L. MCCARTHY. 

